Chanco, B. (2001). Telecoms clearning house not needed. IN Demand and supply [column]. Philippine Star.
Lua i Stíl Chicago (17ú heag.)Chanco, Boo. "Telecoms Clearning House Not Needed. IN Demand and Supply [column]." Philippine Star 2001.
Lua MLA (9ú heag.)Chanco, Boo. "Telecoms Clearning House Not Needed. IN Demand and Supply [column]." Philippine Star, 2001.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.